Hi Deyan89,
Thank you for your post, I will do my best to assist you.
I understand that the Microphone has not worked with the computer since you purchased it. If you connect the Microphone to another computer, does it work? Have you tried a different Microphone in your notebook?
Here is a document to assist with Resolving Microphone and Line-in Problems (Windows 8). You can test for a hardware failure to rule that out. Testing for Hardware Failure (Windows 8)
If you are still experiencing an issue, I suggest you call HP support, as you should be in warranty. They would be able to remotely connect to your system and possibly locate the issue.
Please call HP technical support at 800-474-6836. If you live outside the US/Canada Region, please click the link below to get the support number for your region.HP Technical Support Sitemap
